Section 8 Troubleshooting
8.1 General troubleshooting
Problem Probable cause Resolution
It takes a long time for
the measurement to
become stable or the
measurement does
not become stable
during calibration in
air.
The sample temperature is very
different from the ambient
temperature. For example, 6 °C
(43 °F) in water and 35 °C (95 °F)
in air will cause a measurement
drift.
Automatic temperature compensation is in the range
0 to 45 °C (32 to 113 °F).
There is an electrolyte leak
through the membrane. The
current is too high because of an
excessive penetration of oxygen.
Do the steps in Replace the membrane on page 21.
There is contamination in the
electrolyte due to a loose filling
screw.
Replace the electrolyte. Make sure that the
electrolyte filling washer is installed with the plastic
filling screw. Tighten the plastic filling screw with a
screwdriver, but do not use excessive force.
The electrode is not correctly
mounted in the sensor body, so
there is a gap between the
membrane and the cathode of
the electrode.
Remove the electrolyte filling screw. Then, hand
tighten the holding nut for the electrode. Install the
electrolyte filling screw again.
The membrane is not correctly
installed. There is a risk of
contamination in the electrolyte.
Replace the electrolyte. Install the used membrane
on the sensor body until finger tight.
There is a no humidity due to the
high temperature.
Use a calibration cap to supply humidity.
There is water or humidity in the
sensor cable connector.
Dry the sensor cable connector inside and out.
The gold surface of the electrode
is scratched or damaged.
Replace the electrode. Refer to the illustrated steps
in Assemble the sensor on page 8.
There is sludge or particles on
the cathode of the electrode.
Clean the cathode with a soft and absorbent tissue.
Rinse the membrane with demineralized water.
Damage to the sensor cable or
connections occurred.
Examine the sensor cable connection at the module
in the controller. If correct, examine the connections
at the sensor cable connector.
The sensor orientation is not
correct. The electrolyte has a
leak and air bubbles have
entered the cathode of the
electrode.
Put the sensor in the correct position (membrane
down).
English 23
To Next Page
Loading...
